Global Patent Index - EP 1957866 A4

EP 1957866 A4 2013-09-11 - CIRCULATING FLUIDIZED BED BOILER HAVING IMPROVED REACTANT UTILIZATION

Title (en)

CIRCULATING FLUIDIZED BED BOILER HAVING IMPROVED REACTANT UTILIZATION

Title (de)

ZIRKULIERENDER WIRBELBETTKESSEL MIT VERBESSERTER REAKTIONSMITTELNUTZUNG

Title (fr)

CHAUDIERE A LIT FLUIDISE CIRCULANT UTILISANT LE REACTIF DE MANIERE OPTIMISEE

Publication

EP 1957866 A4 (EN)

Application

EP 06827761 A

Priority

  • US 2006044016 W
  • US 28191505 A

Abstract (en)

[origin: WO2007061668A2] A circulating fluidized bed boiler having improved reactant utilization. The circulating fluidized bed boiler includes a circulating fluidized bed having a dense bed portion; a lower furnace portion adjacent to the dense bed portion; and an upper furnace portion, wherein the dense bed portion of the circulating fluidized bed boiler is maintained below the stoichiometric ratio (fuel rich stage) and the lower furnace portion is maintained above the stoichiometric ratio (fuel lean stage), thereby reducing the formation of NOx.; a reactant to reduce the emission of at least one combustion product in the flue gas; and a plurality of secondary air injection ports downstream of the circulating fluidized bed for providing mixing of the reactant and the flue gas in the furnace above the dense bed, wherein the amount of reactant required for the reduction of the emission of the combustion product is reduced. In a preferred embodiment, the circulating fluidized bed boiler may further include a return system for returning carry over particles from the flue gas to the circulating fluidized bed.

IPC 8 full level (invention and additional information)

F23C 10/10 (2006.01); F23J 7/00 (2006.01)

CPC (invention and additional information)

F23C 10/10 (2013.01); F23J 7/00 (2013.01); F23C 2206/103 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

EPO simple patent family

WO 2007061668 A2 20070531; WO 2007061668 A3 20080103; AU 2006316618 A1 20070531; CN 101292115 A 20081022; CN 101292115 B 20100922; EP 1957866 A2 20080820; EP 1957866 A4 20130911; KR 20080084976 A 20080922; PL 211124 B1 20120430; PL 384257 A1 20080721; RU 2008122212 A 20091227; US 2007119387 A1 20070531; US 7410356 B2 20080812; US 8069825 B1 20111206

INPADOC legal status


2015-09-16 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20150812

2014-04-30 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: THE POWER INDUSTRIAL GROUP LTD

2013-09-11 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20130814

2013-09-11 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: F23J 7/00 20060101ALI20130808BHEP

2013-09-11 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: F23C 10/10 20060101AFI20130808BHEP

2012-08-01 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) DELETED

2008-08-20 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20080605

2008-08-20 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR